Reproduction apparatus



Dec. 22, 1942. c. HERRMANN REPRODUCTION APPARATUS 2 Sheets-Sheet l FiledJan. 3, 1941 Inventar:

Dec. 22, 1942. c. HERRMANN REPRODUCTION APPARATUS 2 Sheets-Sheet 2 FiledJan. 3, 1941' Invenor:

#gaat fam Patented Dec. 22, 1942 REPRODUCTION APPARATUS Carl Herrmann,Jena, Germany; vested in the Alien Property'ustodian applicati@ Januarys, 1941, serial No. 313,004

In Germany 'December 20, 1939 Claims.

Application has been led in Germany, December 20, 1939.

The invention relates to a reproduction apparatus for making colorseparations according to a coloredspecimen and where register marks arerecorded on a photo-sensitive layer simultaneously with the reproductionspecimen. Up to the present a planoparallel glass plate disposed in anobject-plane was usually employed, the glass plate having had a marginimpervious to light and provided with a plurality of register markserased in the shape of cross lines. This arrangement of register markseither requires a corresponding number of glass plates for; thedifferent sizes of picture sections and picture sizes or, when usingonly one single glass plate with iixed register marks for the entireimage field, it makes it necessary that the color separations be made ofthe full picture size in first place whereupon these are masked down tothe required size, so that this procedure involves the waste of aconsiderable amount of material.

To do away with these drawbacks a virtual image of each one of theregister marks adaptable in its position to the eld of the reproductionspecimen, is according to the invention being projected in theobject-plane so that each of the register marks is sharply reproducedIsimultaneously with the reproduction specimen on the samephoto-sensitive layer. It is possible, for instance, to produce thevirtual image of a register mark by means of a mirror, or of a lens, orby a combination of lens and mirror system.

This method of depicting the register marks not only eliminates theaforementioned drawbacks, but also affords the possibility of obtainingon the photo-sensitive layer a good depiction oi?v the register markswithout diffusion of iight in the layer, independent of theexposure-periods for the different color separations, provided that eachof the register marks is being illuminated by a light-source Whosebrightness is regulatable. The arrangement can also be such that allregister marks are being illuminates by one single light-source via asystem of mirrors.

To easily adapt the register marks to the picture size it will be ofadvantage to have each of them adjustably disposed, preferably on across slide.

Where only a section instead of the whole field of a color photograph isrequired for the'colored print it will be of advantage if to each of theregister marks part of a mask is coordinated forming part of the marginrepresenting the 'picture gate. In order to make it conveniently pos-(Cl. 88-247 v sible also to coordinate' the register marks to a sectionof the picture lying in the corner of the field it will be furthermoreof advantage to adjustably dispose each of theregister marks, preferablyon a cross slide, independent of the respective part of the mask.

A constructional example of the invention is illustrated in Figs. 1 to 5of the annexed drawings, viz.:

Fig. 1 showing the reproduction apparatus in plan view and partly inlongitudinal section.

Fig. 2 holding device for color-photograph in plan view and partly insection.

Fig. 3 holding device, top view,

Fig. 4 holding device for holding the glass plates,

Fig. 5 a further example for producing a virtual image of a registermark.

In Fig. 1 a reproduction apparatus is illustrated containing alight-source I which is being imaged at the place of a collective lens Iby means of a two-component condenser lens 2. Said collective lens 3images the aperture of the condenser lens at the place of an object 4.The object may be a color-photograph taken on a film or on a glassplate. The number 5 designates register marks disposed outside theobject-plane near the margin of the photograph. By means of a mirror 6each one of the register marks is being presented to the objective 'i ofthe reproduction apparatus as lying in the object-plane and is beingsharply reproduced on a photo-sensitive layer 8 together with film to bereproduced. A color lter 9 intended for the corresponding colorseparation is disposed insertably in the path of rays between thecollective lens 3 and the object I. A concave mirror I0 is provided foron the rear of the camera housing I I.

Figs. 2 to 4 show the holding device for the object 4, the deviceconsisting of a plate I2 which is to be imagined to be disposed lin thecamera housing II in the object-plane and which is provided with anopening I3 for a 24 x 36 mm. color photograph. This opening is coveredwith a planoparallel glass plate I4 inserted in the plate I2.. A secondplanoparallel glass plate I5 is coordinated to plate I4 which, as shownin Fig. 4, is held to plate l2 by means of four double-armed grippingbodies I6. Each of the latter bodies is seated on a. screw I1 which isdisposed at the plate and which can either be tightened or loosened bynieans of an adjusting head I8. Between the plate I2 and the grippingbody I6 a helical spring I9 is disposed on a screw for releasing thegrip the gripping body has on the glass plate I5.

body 21 wherein it can be adjusted parallel to the optic axis of theapparatus. On a cross slide 28 and by means of a sliding foot 29 eachsupporting body 21 is displaceably disposed in a s1iderail 30 runningparallel to the outer edge of the maskpart bc-unding the picture andcanbe i'lxed which runs at right angles to the direction of the sliderail 30 and can be clamped in position. To clamp each slide 28 inposition, provision is made of a screw 33twith square head 34 and aclamping nut 35 whose shaft slides in a slot 38 running in the directionof groove 32 and whose head 84 slides in a groove 31. The mask-parts areattached to the respective cross slide 28 by The register marks arebeing illuminated by an incandescent lamp 40 each.

The latter lamps are to be imagined to be connected to a mutual sourceof energy by means oi' a rheostat. As indicated on the left half of Fig.

3 the adjustment of the mask-parts can be effected according to agraduation 4I on plate I2 by means of a pointer 42 (Fig. 2) provided foron the supporting body 21. i

Fig. 5 shows a diagram of a further constructional example designed iorproducing a virtual image of register mark 5. The register mark isprovided for on one of the lateral surfaces of a prism 43 and is beingilluminated bythe lightsource 40 through the reecting surface 44. The

duction apparatus as lying in the object-plane. cl

aim: i. A reproduction apparatus for making color separations accordingto a colored specimen comprising an object carrier, means for attachinga colored specimen on said object carrier, a light source being adaptedto illuminate said specimen. an optical system adapted to image saidspecimen on a photo-sensitive layer, a plurality of register marks, eachof said register marks being disposed displaceably on saidobject-carrier 2. A reproduction apparatus for making color separationsaccording to a colored specimen comprising an object carrier, means forattaching a colored specimen on said object carrier, a light sourcebeing adapted to illuminate said specimen, an optical system adapted toimage said speci men on a photo-sensitive layer, a plurality of registermarks, each of said register marks being disposed displaceably on saidobject-carrier parand illuminating means regulatable in brightness andadapted to illuminate said register marks.

3. A reproduction apparatus for making colon 4. A reproduction apparatusfor making color separations according to a colored specimen comprisingan object carrier, means for attaching a colored specimen on said objectcarrier, a light displaceably on said object-carrier parallel to theplane containing said specimen, optical means adapted to present saidregister marks to said optical system as lying in the plane of saidspecimen near to the margin of the latter, and a plurality of diaphragms.serving to bound the picture, each of said diaphragms being adjustablymounted on said object-carrier.

parallel to the plane containing said specimen, i

and cptical means adapted to present said register marks to said opticalsystem as lying in the lane of said specimen near to the margin of thelatter.

5. A reproduction apparatus for making color separations according to acolored specimen, comprising an object-carrier, means for attaching acolored specimen on said object carrier, a light marks, each oi' saidregister marks being disposed displaceably on said object-carrierparallel to the plane containing said specimen, optical means adapted topresent said register marks to said optical system as lying in the planeof said CARL HERRMANN.

